2021074145 has 4 divisors (see below), whose sum is σ = 2425288980. Its totient is φ = 1616859312.

The previous prime is 2021074129. The next prime is 2021074151. The reversal of 2021074145 is 5414701202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414701202 = 2 ⋅2707350601.

It can be written as a sum of positive squares in 2 ways, for example, as 555639184 + 1465434961 = 23572^2 + 38281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021074145 - 2⁴ = 2021074129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202107410 + ... + 202107419.

It is an arithmetic number, because the mean of its divisors is an integer number (606322245).

Almost surely, 2^2021074145 is an apocalyptic number.

It is an amenable number.

2021074145 is a deficient number, since it is larger than the sum of its proper divisors (404214835).

2021074145 is an equidigital number, since it uses as much as digits as its factorization.

2021074145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404214834.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2021074145 is about 44956.3582266180. The cubic root of 2021074145 is about 1264.3308901869.

Adding to 2021074145 its reverse (5414701202), we get a palindrome (7435775347).

The spelling of 2021074145 in words is "two billion, twenty-one million, seventy-four thousand, one hundred forty-five".